<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../vue.js"></script>
</head>
<body>
    <div id="app">
    姓氏: <input type="text" v-model="surnames"><br>
    名字: <input type="text" v-model="theName"><br>
    全名:{{surnames.toUpperCase() + "-" + theName.toUpperCase()}}
    <!-- toUpperCase() 将字母转化成大写 -->
    </div>
    <script>
        const vm = new Vue({
            el:'#app',
            data() {
                return {
                    surnames:'',
                    theName:'',
                }
            },
        })
    </script>
</body>
</html>